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Loans and Allowance for Credit Losses (Troubled Debt Restructurings With Subsequent Default) (Details) - contract
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Loans and Allowance for Credit Losses [Abstract]        
Number of contracts 0 0 0 0